 public class Example2_4 {

   public static void main(String args[]) {

      int a[]={1,2,3,4};

      int b[]={100,200,300};

      System.out.println("数组a的元素个数="+a.length);

      System.out.println("数组b的元素个数="+b.length);

      System.out.println("数组a的引用="+a);

      System.out.println("数组b的引用="+b);

      a=b;

      System.out.println("数组a的元素个数="+a.length);

      System.out.println("数组b的元素个数="+b.length);

      System.out.println("a[0]="+a[0]+",a[1]="+a[1]+",a[2]="+a[2]);

      System.out.print("b[0]="+b[0]+",b[1]="+b[1]+",b[2]="+b[2]);

   }

} 
